I too am having this problem. For me, when I get in the game, I cannot hear "Welcome to Summoner's Rift." The message stays up there altogether and never leaves. I cannot hear the champions when doing the /laugh, /joke, /taunt commands. They will say something if they move or attack, but never anything else. Also, I don't hear "Turret destroyed" "Spawning Super Minions" "______ slain the Dragon" "Double Kill" "Triple Kill" Etc. Basically nothing but background music and the fights. Thank you so much!